The temperature in a chemical plant was -5 o C at 2.00 am. The temperature
MATHEMATICS
WAEC 2006
The temperature in a chemical plant was -5oC at 2.00 am. The temperature fell by 6oC and then rose again by 7oC. What was the final temperature?
- A. -6oC
- B. -4oC
- C. 4oC
- D. 8oC
Correct Answer: B. -4oC
Explanation
Temperature = -5oC
It fell by 6oC = -5oC - 6oC
= -11oC
Then rose by 7oC = -11 + 7
= -4oC (final temperature)
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